from django.template import RequestContext
from boards import forms
import boards
from boards.models import Post, Admin
from django.shortcuts import render, get_list_or_404, redirect
from django.http import HttpResponseRedirect, Http404

def index(request):
    context = RequestContext(request)

    if request.method == 'POST':
        return new_post(request)
    else:
        threads = Post.objects.get_threads()

        context['threads'] = None if len(threads) == 0 else threads
        context['form'] = forms.NewThreadForm()

        return render(request, 'posting_general.html',
            context)

def new_post(request, thread_id = boards.models.NO_PARENT):
    """Add a new post (in thread or as a reply)."""

    title = request.POST['title']
    text = request.POST['text']
    ip = request.META['REMOTE_ADDR']

    # TODO Get tags list, download image (if link is given)

    post = Post.objects.create_post(title = title, text = text, ip = ip,
        parent_id = thread_id)

    if thread_id != boards.models.NO_PARENT:
        request.method = 'GET'
        return thread(request, thread_id)
    else:
        return redirect(thread, id = post.id)

def tag(request):
    """Get all tag threads (posts without a parent)."""

    tag_name = request.GET['tag']

    threads = get_list_or_404(Post, tag = tag_name)

    context = RequestContext(request)
    context['threads'] = None if len(threads) == 0 else threads
    context['tag'] = tag_name

    return render(request, 'posting_general.html',
        context)

def thread(request, id):
    """Get all thread posts"""

    if request.method == 'POST':
        return new_post(request, id)
    else:
        # TODO Show 404 if there is no such thread
        posts = Post.objects.get_thread(id)

        context = RequestContext(request)
        context['posts'] = posts

        context['form'] = forms.NewThreadForm()

        return render(request, 'thread.html', context)

def login(request):
    """Log in as admin"""

    if 'name' in request.POST and 'password' in request.POST:
        request.session['admin'] = False

        isAdmin = len(Admin.objects.filter(name = request.POST['name'],
            password = request.POST['password'])) > 0

        if isAdmin :
            request.session['admin'] = True

            response = HttpResponseRedirect('/boards')

        else:
            response = render(request, 'login.html', {'error' : 'Login error'})
    else:
        response = render(request, 'login.html', {})

    return response

def logout(request):
    request.session['admin'] = False
    return HttpResponseRedirect('/boards')